Determining of the PPN parameter γ from a duirnal VLBI session
Известия ГАО в Пулкове, № 225: Труды Всероссийской астрометрической конференции «Пулково-2018», Санкт-Петербург, 25–28 (2018)
About the paper Full textAbstract
In order to determine the Post-Newtonian parameter γ one need to use all possible VLBI series. Accuracy of parameter γ from a single session is not good enough. A comparison between parameter γ estimated by a single session which includes special sources and from global solution was made. But if observed sources are near the Sun or one of a massive planet, accuracy of parameter γ will be better. Formal errors of parameter γ estimated by global solution of a big set of VLBI observations and computed by different authors is 1.5–2 times less than a formal error estimated by one session included sources near the Sun. Also a comparison between parameter γ estimated by a single session included sources near the Sun by OCCAM, Calc/Solve, QUASAR software packages.